Cisco Cisco Expressway メンテナンスマニュアル
Note that:
■
Any number of ENUM zones may be configured on the Expressway. You should configure at least one ENUM
zone for each DNS suffix that your endpoints may use.
zone for each DNS suffix that your endpoints may use.
■
Normal search rule pattern matching and prioritization rules apply to ENUM zones.
■
to be used when searching for NAPTR
records.
Configuring search rules for ENUM zones
If you want to be able to make ENUM calls via the Expressway, then at a minimum you should configure an ENUM
zone and a related search rule with:
zone and a related search rule with:
■
a DNS suffix of
e164.arpa
(the domain specified by the ENUM standard)
■
a related search rule with a Mode of Any alias
This results in DNS always being queried for all types of aliases, not just ENUMs. It also means that ENUM dialing will
only be successful if the enterprise being dialed uses the
only be successful if the enterprise being dialed uses the
e164.arpa
domain. To ensure successful ENUM dialing, you
must configure an ENUM zone for each domain that holds NAPTR records for endpoints that callers in your enterprise
might want to dial.
might want to dial.
You can then set up search rules that filter the queries sent to each ENUM zone as follows:
■
use a Mode of Alias pattern match
■
use the Pattern string and Pattern type fields to define the aliases for each domain that will trigger an ENUM
lookup
lookup
For example, you want to enable ENUM dialing from your network to a remote office in the UK where the endpoints’
E.164 numbers start with
E.164 numbers start with
44
. You would configure an ENUM zone on your Expressway, and then an associated search
rule with:
■
Mode of Alias pattern match
■
Pattern string of
44
■
Pattern type of Prefix
This results in an ENUM query being sent to that zone only when someone dials a number starting with
44
.
Configuring transforms for ENUM zones
Any ENUM zone transforms are applied before the number is converted to an ENUM domain.
For example, you want to enable ENUM dialing from your network to endpoints at a remote site using a prefix of
8
followed by the last 4 digits of the remote endpoints’ E.164 number. You would configure an ENUM zone on your
Expressway and then an associated search rule with:
Expressway and then an associated search rule with:
■
Mode of Alias pattern match
■
Pattern string of
8(\d{4})
■
Pattern type of Regex
■
Pattern behavior of Replace
■
Replace string of
44123123(\1)
With this configuration, it is the resulting string (
44123123xxxx
) that is converted into an ENUM domain and queried for
via DNS.
Locate) to try to resolve an E.164 alias.
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Cisco Expressway Administrator Guide